非圆形截面复合材料机身屈曲优化设计

Buckling Analysis and Optimization Design of Non-cylindrical Fuselage

为了降低BWB机身弯曲应力、提高屈曲稳定性,在150座BWB民机复合材料三舱室机身结构的基础上,提出了改进的Y形和弧形加强三舱室机身设计模型;利用零阶参数优化算法,对3种机身结构进行了静力与线性屈曲优化分析,获得了较为合理的三舱室机身布局方案,为BWB民机机身设计提供了重要技术参考。

To reduce the bending stress and improve buckling stability,improved Y-brace and arc-brace fuselages is designed based on a composite tri-cabin fuselage of BWB-150.The zero-order parameter optimization arithmetic is used to optimize these three fuselage configurations in static and linear buckling field.A reasonable tri-cabin configuration is obtained by the optimization analyses,thus providing important technical reference for the fuselage design of BWB commercial airplane.